msm: Add secure vmid for msa

For sharing the memory between hlos and modem,
a new secure vmid is needed to be used in the
assign api. Define that.

Change-Id: Ibcddbafeb1fc430aae3fcda7c609bca4d81e57a9
Signed-off-by: Neeti Desai <neetid@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>